I've not really been following Battlefield - I'm probably going to get COD, but it was about 50:50 for a while.

Would I be right in thinking all this levolution "changing the map with one well placed shot" stuff just means that [most/all] of the multiplayer maps change if a certain object is blown up or interacted with in some way? Sort of like maps have been doing on multiplayer fps maps for years? (e.g. Black Ops 1 back in 2010 where you could open blast doors by pressing a button).

Or can maps be affected in several different ways - if you bring down the skyscraper it might block the road you want, or it might go in a different direction?

@Late: That whole "changing the map with one well placed shot" Levolution line feels a little disingenuous after playing the Shanghai beta map. Levolution seems to be more about big binary set pieces (blowing up the skyscraper to make it crumble into a preset pile of rubble that's the same every time, like flicking a lightswitch) or pressing buttons to raise bollards rather than dynamically affecting the level geometry in meaningful ways by destroying the scenery.

We'll have to wait for the other levels, such as Paracel Storm, to really see if Levolution is a game-changer or just a buzzword.

Thanks Jon. I've a lot of love for Battlefield - it has a lot of redeeming features and I've enjoyed the (3 or so) incarnations I've bought (bad company much more than the others, mind.)
But I can't understand them focussing all of their marketing on this levolution stuff if it's just the set pieces it appears to be.
Again, I stress I've not been following Battlefield very closely in the last couple of months, and it sounds like information on how it works has been limited, so I may have it all wrong.

Battlefield has always been about the multiplayer, and the single player has never been great IMO. The massive maps look amazing, and I'm so glad you can now use the circle button to duck/prone.

Personally though, I just find playing against gobby 14 year olds swearing a bit tiring after say 2 minutes, but I get why its good if you're into multiplayer. For me, I'm more interested in a good story and single player mode, so I'll probably still get COD.